Regular Expression help 1

[Laeg]

Can I get some help with a regular expression? I'm trying to express the following for a string

Up to 4 digits, but the first digit must be a 0 followed by a hyphen followed by up to 7 digits. So the following are examples of valid strings

02-456
0546-456789

Thanks

 

[feherke]

Hi

Up to 4 digits, but the first digit must be a 0 followed by a hyphen followed by up to 7 digits.

Let us rephrase it as a '0' character followed by up to 0..3 digits, followed by a hyphen, followed by up to 0..7 digits. Because you not specified the lower limit for those "up to" ;-) :

/^0[[:digit:]]{0,3}-[[:digit:]]{0,7}$

Just adjust the lower limits of the quantifiers if needed.


Feherke.

http://rootshell.be/~feherke/